@article{c3cc7d8bf6704aa6b350958962cf2ee3,
title = "Amplitude analysis of the B0(s)→K∗0 K̅¯∗0 decays and measurement of the branching fraction of the B0→ K∗0K̅¯∗0 decay",
abstract = "The B0→ K∗0K̅¯∗0 and Bs0→K∗0 K̅¯∗0 decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3 fb−1. An untagged and timeintegrated amplitude analysis of B(s)0 → (K+π−)(K−π+) decays in two-body invariant mass regions of 150 MeV/c2 around the K∗0 mass is performed. A stronger longitudinal polarisation fraction in the B0→ K∗0K̅¯∗0 decay, fL = 0.724 ± 0.051 (stat) ± 0.016 (syst), is observed as compared to fL = 0.240 ± 0.031 (stat) ± 0.025 (syst) in the Bs0→K∗0 K̅¯∗0 decay. The ratio of branching fractions of the two decays is measured and used to determine ℬ(B0→ K∗0K̅¯∗0)=(8.0±0.9(stat)±0.4(syst))×10−7.",
keywords = "B physics, Hadron-Hadron scattering (experiments)",
author = "{LHCb Collaboration} and R. Aaij and {Abell{\'a}n Beteta}, C. and B. Adeva and M. Adinolfi and Aidala, {C. A.} and Z. Ajaltouni and S. Akar and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. and G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, {J. E.} and F. Archilli and {Arnau Romeu}, J. and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and Back, {J. J.} and S. Baker and V. Balagura and W. Baldini and S. Bifani and R. Calladine and G. Chatzikonstantinidis and N. Farley and P. Griffith and P. Ilten and C. Lazzeroni and L. Pescatore and J. Plews and D. Popov and A. Sergi and Slater, {M. W.} and Watson, {N. K.} and T. Williams and Zarebski, {K. A.}",
year = "2019",
month = jul,
day = "5",
doi = "10.1007/JHEP07(2019)032",
language = "English",
volume = "2019",
journal = "Journal of High Energy Physics",
issn = "1126-6708",
publisher = "Springer",
number = "7",
}